match( "/* | /text()" ) causes error from _InternalEvaluate()

[<gk...@pr...>]

 * @version 3.1
 * @CVS $Id: XPath.class.php,v 1.99 2002/06/20 12:20:38 bs_php Exp $
 */
No matter what your input xml looks like, it seems you cannot use '|'
operator with a combination of textParts and childNodes:

Xpath->match( "/* | /text()" )

results in this message:
XPath error in -:-</b> Results from _InternalEvaluate() are corrupt.  Do
you
need to call reindexNodeTree()?

Given input:
<a>cdata<b>cdata</b></a>

The following matches work fine:
Xpath->match( "/* | /a/*" )
Xpath->match( "/text()" )
Xpath->match( "/a/text()" )

The following fail:
Xpath->match( "/text() | /a/text()" )
Xpath->match( "//text()" )

Are these bugs or is my xpath invalid?
- Greg